Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

Login

Username

Password

Not registered yet?

#1 2008-09-14 07:35:29

tony123
Full Member

Offline

N!

For a positive integer,

, we define N! (read N factorial) to
be the product of all the integers from 1 to N. Thus:

It is clear that N! will end in a zero if N is larger or equal to
5. For big values of N, N! will end in many, many zeros.
How many zeros will
end in?

Last edited by tony123 (2008-09-14 07:38:07)

 

#2 2008-09-14 08:17:47

mathsyperson
Moderator

Offline

Re: N!

75/5 + 75/5² = 18.


Why did the vector cross the road?
It wanted to be normal.
 

Board footer

Powered by FluxBB